Originally Posted by
Scrodzilla
c-t measurement should mean center of the BB to the top of the top tube, but some manufacturers make it confusing by measuring to the top of the actual seat tube - which is why it's always a better idea to base your fit off the c-c measurement.
That crap struck first in MTB world cuz they went sloped TTs BITD. Now measurements are all over the place. If you wanna figure out what a frame is gonna be like it has to be built up and you need to bring a level and a plumb bob to figure it all out.
Originally Posted by
Scrodzilla
Also, top tube measurement is always much more of a factor than the seat tube.
"Real world" dude cracks me up. I ride 15.5 - 19" seat tube mountain bikes (sized by manufacturers), and they fit nicely. Those numbers don't really mean a damn thing.
Gotta add : Real world for me is that seat tube length only really matters when you're getting olde square road frames.